mirror of
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685 lines
24 KiB
Markdown
685 lines
24 KiB
Markdown
# Publishing
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Publishing messages can be done via HTTP PUT or POST. Topics are created on the fly by subscribing or publishing to them.
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Because there is no sign-up, **the topic is essentially a password**, so pick something that's not easily guessable.
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Here's an example showing how to publish a simple message using a POST request:
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=== "Command line (curl)"
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```
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curl -d "Backup successful 😀" ntfy.sh/mytopic
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```
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=== "HTTP"
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``` http
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POST /mytopic HTTP/1.1
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Host: ntfy.sh
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Backup successful 😀
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/mytopic', {
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method: 'POST', // PUT works too
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body: 'Backup successful 😀'
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})
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```
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=== "Go"
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``` go
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http.Post("https://ntfy.sh/mytopic", "text/plain",
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strings.NewReader("Backup successful 😀"))
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/mytopic",
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data="Backup successful 😀".encode(encoding='utf-8'))
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/mytopic', false, stream_context_create([
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'http' => [
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'method' => 'POST', // PUT also works
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'header' => 'Content-Type: text/plain',
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'content' => 'Backup successful 😀'
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]
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]));
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```
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If you have the [Android app](subscribe/phone.md) installed on your phone, this will create a notification that looks like this:
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<figure markdown>
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{ width=500 }
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<figcaption>Android notification</figcaption>
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</figure>
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There are more features related to publishing messages: You can set a [notification priority](#message-priority),
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a [title](#message-title), and [tag messages](#tags-emojis) 🥳 🎉. Here's an example that uses some of them at together:
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=== "Command line (curl)"
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```
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curl \
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-H "Title: Unauthorized access detected" \
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-H "Priority: urgent" \
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-H "Tags: warning,skull" \
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-d "Remote access to phils-laptop detected. Act right away." \
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ntfy.sh/phil_alerts
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```
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=== "HTTP"
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``` http
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POST /phil_alerts HTTP/1.1
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Host: ntfy.sh
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Title: Unauthorized access detected
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Priority: urgent
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Tags: warning,skull
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Remote access to phils-laptop detected. Act right away.
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/phil_alerts', {
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method: 'POST', // PUT works too
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body: 'Remote access to phils-laptop detected. Act right away.',
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headers: {
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'Title': 'Unauthorized access detected',
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'Priority': 'urgent',
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'Tags': 'warning,skull'
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}
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})
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```
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=== "Go"
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``` go
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req, _ := http.NewRequest("POST", "https://ntfy.sh/phil_alerts",
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strings.NewReader("Remote access to phils-laptop detected. Act right away."))
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req.Header.Set("Title", "Unauthorized access detected")
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req.Header.Set("Priority", "urgent")
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req.Header.Set("Tags", "warning,skull")
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http.DefaultClient.Do(req)
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/phil_alerts",
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data="Remote access to phils-laptop detected. Act right away.",
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headers={
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"Title": "Unauthorized access detected",
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"Priority": "urgent",
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"Tags": "warning,skull"
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})
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/phil_alerts', false, stream_context_create([
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'http' => [
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'method' => 'POST', // PUT also works
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'header' =>
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"Content-Type: text/plain\r\n" .
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"Title: Unauthorized access detected\r\n" .
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"Priority: urgent\r\n" .
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"Tags: warning,skull",
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'content' => 'Remote access to phils-laptop detected. Act right away.'
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]
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]));
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```
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<figure markdown>
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{ width=500 }
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<figcaption>Urgent notification with tags and title</figcaption>
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</figure>
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## Message title
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The notification title is typically set to the topic short URL (e.g. `ntfy.sh/mytopic`). To override the title,
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you can set the `X-Title` header (or any of its aliases: `Title`, `ti`, or `t`).
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=== "Command line (curl)"
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```
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curl -H "X-Title: Dogs are better than cats" -d "Oh my ..." ntfy.sh/controversial
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curl -H "Title: Dogs are better than cats" -d "Oh my ..." ntfy.sh/controversial
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curl -H "t: Dogs are better than cats" -d "Oh my ..." ntfy.sh/controversial
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```
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=== "HTTP"
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``` http
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POST /controversial HTTP/1.1
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Host: ntfy.sh
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Title: Dogs are better than cats
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Oh my ...
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/controversial', {
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method: 'POST',
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body: 'Oh my ...',
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headers: { 'Title': 'Dogs are better than cats' }
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})
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```
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=== "Go"
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``` go
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req, _ := http.NewRequest("POST", "https://ntfy.sh/controversial", strings.NewReader("Oh my ..."))
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req.Header.Set("Title", "Dogs are better than cats")
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http.DefaultClient.Do(req)
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/controversial",
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data="Oh my ...",
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headers={ "Title": "Dogs are better than cats" })
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/controversial', false, stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' =>
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"Content-Type: text/plain\r\n" .
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"Title: Dogs are better than cats",
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'content' => 'Oh my ...'
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]
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]));
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```
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<figure markdown>
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{ width=500 }
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<figcaption>Detail view of notification with title</figcaption>
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</figure>
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## Message priority
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All messages have a priority, which defines how urgently your phone notifies you. You can set custom
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notification sounds and vibration patterns on your phone to map to these priorities (see [Android config](subscribe/phone.md)).
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The following priorities exist:
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| Priority | Icon | ID | Name | Description |
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| Max priority |  | `5` | `max`/`urgent` | Really long vibration bursts, default notification sound with a pop-over notification. |
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| High priority |  | `4` | `high` | Long vibration burst, default notification sound with a pop-over notification. |
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| **Default priority** | *(none)* | `3` | `default` | Short default vibration and sound. Default notification behavior. |
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| Low priority |  |`2` | `low` | No vibration or sound. Notification will not visibly show up until notification drawer is pulled down. |
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| Min priority |  | `1` | `min` | No vibration or sound. The notification will be under the fold in "Other notifications". |
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You can set the priority with the header `X-Priority` (or any of its aliases: `Priority`, `prio`, or `p`).
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=== "Command line (curl)"
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```
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curl -H "X-Priority: 5" -d "An urgent message" ntfy.sh/phil_alerts
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curl -H "Priority: low" -d "Low priority message" ntfy.sh/phil_alerts
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curl -H p:4 -d "A high priority message" ntfy.sh/phil_alerts
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```
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=== "HTTP"
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``` http
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POST /phil_alerts HTTP/1.1
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Host: ntfy.sh
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Priority: 5
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An urgent message
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/phil_alerts', {
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method: 'POST',
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body: 'An urgent message',
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headers: { 'Priority': '5' }
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})
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```
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=== "Go"
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``` go
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req, _ := http.NewRequest("POST", "https://ntfy.sh/phil_alerts", strings.NewReader("An urgent message"))
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req.Header.Set("Priority", "5")
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http.DefaultClient.Do(req)
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/phil_alerts",
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data="An urgent message",
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headers={ "Priority": "5" })
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/phil_alerts', false, stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' =>
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"Content-Type: text/plain\r\n" .
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"Priority: 5",
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'content' => 'An urgent message'
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]
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]));
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```
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<figure markdown>
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{ width=500 }
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<figcaption>Detail view of priority notifications</figcaption>
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</figure>
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## Tags & emojis 🥳 🎉
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You can tag messages with emojis and other relevant strings:
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* **Emojis**: If a tag matches an [emoji short code](emojis.md), it'll be converted to an emoji and prepended
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to title or message.
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* **Other tags:** If a tag doesn't match, it will be listed below the notification.
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This feature is useful for things like warnings (⚠️, ️🚨, or 🚩), but also to simply tag messages otherwise (e.g. script
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names, hostnames, etc.). Use [the emoji short code list](emojis.md) to figure out what tags can be converted to emojis.
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Here's an **excerpt of emojis** I've found very useful in alert messages:
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<table class="remove-md-box"><tr>
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<td>
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<table><thead><tr><th>Tag</th><th>Emoji</th></tr></thead><tbody>
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<tr><td><code>+1</code></td><td>👍️</td></tr>
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<tr><td><code>partying_face</code></td><td>🥳</td></tr>
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<tr><td><code>tada</code></td><td>🎉</td></tr>
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<tr><td><code>heavy_check_mark</code></td><td>✔️</td></tr>
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<tr><td><code>loudspeaker</code></td><td>📢</td></tr>
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<tr><td>...</td><td>...</td></tr>
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</tbody></table>
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</td>
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<td>
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<table><thead><tr><th>Tag</th><th>Emoji</th></tr></thead><tbody>
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<tr><td><code>-1</code></td><td>👎️</td></tr>
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<tr><td><code>warning</code></td><td>⚠️</td></tr>
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<tr><td><code>rotating_light</code></td><td>️🚨</td></tr>
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<tr><td><code>triangular_flag_on_post</code></td><td>🚩</td></tr>
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<tr><td><code>skull</code></td><td>💀</td></tr>
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<tr><td>...</td><td>...</td></tr>
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</tbody></table>
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</td>
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<td>
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<table><thead><tr><th>Tag</th><th>Emoji</th></tr></thead><tbody>
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<tr><td><code>facepalm</code></td><td>🤦</td></tr>
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<tr><td><code>no_entry</code></td><td>⛔</td></tr>
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<tr><td><code>no_entry_sign</code></td><td>🚫</td></tr>
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<tr><td><code>cd</code></td><td>💿</td></tr>
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<tr><td><code>computer</code></td><td>💻</td></tr>
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<tr><td>...</td><td>...</td></tr>
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</tbody></table>
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</td>
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</tr></table>
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You can set tags with the `X-Tags` header (or any of its aliases: `Tags`, `tag`, or `ta`). Specify multiple tags by separating
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them with a comma, e.g. `tag1,tag2,tag3`.
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=== "Command line (curl)"
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```
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curl -H "X-Tags: warning,mailsrv13,daily-backup" -d "Backup of mailsrv13 failed" ntfy.sh/backups
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curl -H "Tags: horse,unicorn" -d "Unicorns are just horses with unique horns" ntfy.sh/backups
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curl -H ta:dog -d "Dogs are awesome" ntfy.sh/backups
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```
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=== "HTTP"
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``` http
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POST /backups HTTP/1.1
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Host: ntfy.sh
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Tags: warning,mailsrv13,daily-backup
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Backup of mailsrv13 failed
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/backups', {
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method: 'POST',
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body: 'Backup of mailsrv13 failed',
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headers: { 'Tags': 'warning,mailsrv13,daily-backup' }
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})
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```
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=== "Go"
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``` go
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req, _ := http.NewRequest("POST", "https://ntfy.sh/backups", strings.NewReader("Backup of mailsrv13 failed"))
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req.Header.Set("Tags", "warning,mailsrv13,daily-backup")
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http.DefaultClient.Do(req)
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/backups",
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data="Backup of mailsrv13 failed",
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headers={ "Tags": "warning,mailsrv13,daily-backup" })
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/backups', false, stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' =>
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"Content-Type: text/plain\r\n" .
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"Tags: warning,mailsrv13,daily-backup",
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'content' => 'Backup of mailsrv13 failed'
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]
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]));
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```
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<figure markdown>
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{ width=500 }
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<figcaption>Detail view of notifications with tags</figcaption>
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</figure>
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## Scheduled delivery
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You can delay the delivery of messages and let ntfy send them at a later date. This can be used to send yourself
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reminders or even to execute commands at a later date (if your subscriber acts on messages).
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Usage is pretty straight forward. You can set the delivery time using the `X-Delay` header (or any of its aliases: `Delay`,
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`X-At`, `At`, `X-In` or `In`), either by specifying a Unix timestamp (e.g. `1639194738`), a duration (e.g. `30m`,
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`3h`, `2 days`), or a natural language time string (e.g. `10am`, `8:30pm`, `tomorrow, 3pm`, `Tuesday, 7am`,
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[and more](https://github.com/olebedev/when)).
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As of today, the minimum delay you can set is **10 seconds** and the maximum delay is **3 days**. This can currently
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not be configured otherwise ([let me know](https://github.com/binwiederhier/ntfy/issues) if you'd like to change
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these limits).
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For the purposes of [message caching](config.md#message-cache), scheduled messages are kept in the cache until 12 hours
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after they were delivered (or whatever the server-side cache duration is set to). For instance, if a message is scheduled
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to be delivered in 3 days, it'll remain in the cache for 3 days and 12 hours. Also note that naturally,
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[turning off server-side caching](#message-caching) is not possible in combination with this feature.
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=== "Command line (curl)"
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```
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curl -H "At: tomorrow, 10am" -d "Good morning" ntfy.sh/hello
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curl -H "In: 30min" -d "It's 30 minutes later now" ntfy.sh/reminder
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curl -H "Delay: 1639194738" -d "Unix timestamps are awesome" ntfy.sh/itsaunixsystem
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```
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=== "HTTP"
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``` http
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POST /hello HTTP/1.1
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Host: ntfy.sh
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At: tomorrow, 10am
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Good morning
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```
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=== "JavaScript"
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``` javascript
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fetch('https://ntfy.sh/hello', {
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method: 'POST',
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body: 'Good morning',
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headers: { 'At': 'tomorrow, 10am' }
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})
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```
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=== "Go"
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``` go
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req, _ := http.NewRequest("POST", "https://ntfy.sh/hello", strings.NewReader("Good morning"))
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req.Header.Set("At", "tomorrow, 10am")
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http.DefaultClient.Do(req)
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```
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=== "Python"
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``` python
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requests.post("https://ntfy.sh/hello",
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data="Good morning",
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headers={ "At": "tomorrow, 10am" })
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```
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=== "PHP"
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``` php-inline
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file_get_contents('https://ntfy.sh/backups', false, stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' =>
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"Content-Type: text/plain\r\n" .
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"At: tomorrow, 10am",
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'content' => 'Good morning'
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]
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]));
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```
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Here are a few examples (assuming today's date is **12/10/2021, 9am, Eastern Time Zone**):
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<table class="remove-md-box"><tr>
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<td>
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<table><thead><tr><th><code>Delay/At/In</code> header</th><th>Message will be delivered at</th><th>Explanation</th></tr></thead><tbody>
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<tr><td><code>30m</code></td><td>12/10/2021, 9:<b>30</b>am</td><td>30 minutes from now</td></tr>
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<tr><td><code>2 hours</code></td><td>12/10/2021, <b>11:30</b>am</td><td>2 hours from now</td></tr>
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<tr><td><code>1 day</code></td><td>12/<b>11</b>/2021, 9am</td><td>24 hours from now</td></tr>
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<tr><td><code>10am</code></td><td>12/10/2021, <b>10am</b></td><td>Today at 10am (same day, because it's only 9am)</td></tr>
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<tr><td><code>8am</code></td><td>12/<b>11</b>/2021, <b>8am</b></td><td>Tomorrow at 8am (because it's 9am already)</td></tr>
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<tr><td><code>1639152000</code></td><td>12/10/2021, 11am (EST)</td><td> Today at 11am (EST)</td></tr>
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</tbody></table>
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</td>
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</tr></table>
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## Webhooks (Send via GET)
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In addition to using PUT/POST, you can also send to topics via simple HTTP GET requests. This makes it easy to use
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a ntfy topic as a [webhook](https://en.wikipedia.org/wiki/Webhook), or if your client has limited HTTP support (e.g.
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like the [MacroDroid](https://play.google.com/store/apps/details?id=com.arlosoft.macrodroid) Android app).
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To send messages via HTTP GET, simply call the `/publish` endpoint (or its aliases `/send` and `/trigger`). Without
|
|
any arguments, this will send the message `triggered` to the topic. However, you can provide all arguments that are
|
|
also supported as HTTP headers as URL-encoded arguments. Be sure to check the list of all
|
|
[supported parameters and headers](#list-of-all-parameters) for details.
|
|
|
|
For instance, assuming your topic is `mywebhook`, you can simply call `/mywebhook/trigger` to send a message
|
|
(aka trigger the webhook):
|
|
|
|
=== "Command line (curl)"
|
|
```
|
|
curl ntfy.sh/mywebhook/trigger
|
|
```
|
|
|
|
=== "HTTP"
|
|
``` http
|
|
GET /mywebhook/trigger HTTP/1.1
|
|
Host: ntfy.sh
|
|
```
|
|
|
|
=== "JavaScript"
|
|
``` javascript
|
|
fetch('https://ntfy.sh/mywebhook/trigger')
|
|
```
|
|
|
|
=== "Go"
|
|
``` go
|
|
http.Get("https://ntfy.sh/mywebhook/trigger")
|
|
```
|
|
|
|
=== "Python"
|
|
``` python
|
|
requests.get("https://ntfy.sh/mywebhook/trigger")
|
|
```
|
|
|
|
=== "PHP"
|
|
``` php-inline
|
|
file_get_contents('https://ntfy.sh/mywebhook/trigger');
|
|
```
|
|
|
|
To add a custom message, simply append the `message=` URL parameter. And of course you can set the
|
|
[message priority](#message-priority), the [message title](#message-title), and [tags](#tags-emojis) as well.
|
|
For a full list of possible parameters, check the list of [supported parameters and headers](#list-of-all-parameters).
|
|
|
|
Here's an example with a custom message, tags and a priority:
|
|
|
|
=== "Command line (curl)"
|
|
```
|
|
curl "ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull"
|
|
```
|
|
|
|
=== "HTTP"
|
|
``` http
|
|
GET /mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull HTTP/1.1
|
|
Host: ntfy.sh
|
|
```
|
|
|
|
=== "JavaScript"
|
|
``` javascript
|
|
fetch('https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull')
|
|
```
|
|
|
|
=== "Go"
|
|
``` go
|
|
http.Get("https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull")
|
|
```
|
|
|
|
=== "Python"
|
|
``` python
|
|
requests.get("https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull")
|
|
```
|
|
|
|
=== "PHP"
|
|
``` php-inline
|
|
file_get_contents('https://ntfy.sh/mywebhook/publish?message=Webhook+triggered&priority=high&tags=warning,skull');
|
|
```
|
|
|
|
## Advanced features
|
|
|
|
### Message caching
|
|
!!! info
|
|
If `Cache: no` is used, messages will only be delivered to connected subscribers, and won't be re-delivered if a
|
|
client re-connects. If a subscriber has (temporary) network issues or is reconnecting momentarily,
|
|
**messages might be missed**.
|
|
|
|
By default, the ntfy server caches messages on disk for 12 hours (see [message caching](config.md#message-cache)), so
|
|
all messages you publish are stored server-side for a little while. The reason for this is to overcome temporary
|
|
client-side network disruptions, but arguably this feature also may raise privacy concerns.
|
|
|
|
To avoid messages being cached server-side entirely, you can set `X-Cache` header (or its alias: `Cache`) to `no`.
|
|
This will make sure that your message is not cached on the server, even if server-side caching is enabled. Messages
|
|
are still delivered to connected subscribers, but [`since=`](subscribe/api.md#fetching-cached-messages) and
|
|
[`poll=1`](subscribe/api.md#polling-for-messages) won't return the message anymore.
|
|
|
|
=== "Command line (curl)"
|
|
```
|
|
curl -H "X-Cache: no" -d "This message won't be stored server-side" ntfy.sh/mytopic
|
|
curl -H "Cache: no" -d "This message won't be stored server-side" ntfy.sh/mytopic
|
|
```
|
|
|
|
=== "HTTP"
|
|
``` http
|
|
POST /mytopic HTTP/1.1
|
|
Host: ntfy.sh
|
|
Cache: no
|
|
|
|
This message won't be stored server-side
|
|
```
|
|
|
|
=== "JavaScript"
|
|
``` javascript
|
|
fetch('https://ntfy.sh/mytopic', {
|
|
method: 'POST',
|
|
body: 'This message won't be stored server-side',
|
|
headers: { 'Cache': 'no' }
|
|
})
|
|
```
|
|
|
|
=== "Go"
|
|
``` go
|
|
req, _ := http.NewRequest("POST", "https://ntfy.sh/mytopic", strings.NewReader("This message won't be stored server-side"))
|
|
req.Header.Set("Cache", "no")
|
|
http.DefaultClient.Do(req)
|
|
```
|
|
|
|
=== "Python"
|
|
``` python
|
|
requests.post("https://ntfy.sh/mytopic",
|
|
data="This message won't be stored server-side",
|
|
headers={ "Cache": "no" })
|
|
```
|
|
|
|
=== "PHP"
|
|
``` php-inline
|
|
file_get_contents('https://ntfy.sh/mytopic', false, stream_context_create([
|
|
'http' => [
|
|
'method' => 'POST',
|
|
'header' =>
|
|
"Content-Type: text/plain\r\n" .
|
|
"Cache: no",
|
|
'content' => 'This message won't be stored server-side'
|
|
]
|
|
]));
|
|
```
|
|
|
|
### Disable Firebase
|
|
!!! info
|
|
If `Firebase: no` is used and [instant delivery](subscribe/phone.md#instant-delivery) isn't enabled in the Android
|
|
app (Google Play variant only), **message delivery will be significantly delayed (up to 15 minutes)**. To overcome
|
|
this delay, simply enable instant delivery.
|
|
|
|
The ntfy server can be configured to use [Firebase Cloud Messaging (FCM)](https://firebase.google.com/docs/cloud-messaging)
|
|
(see [Firebase config](config.md#firebase-fcm)) for message delivery on Android (to minimize the app's battery footprint).
|
|
The ntfy.sh server is configured this way, meaning that all messages published to ntfy.sh are also published to corresponding
|
|
FCM topics.
|
|
|
|
If you'd like to avoid forwarding messages to Firebase, you can set the `X-Firebase` header (or its alias: `Firebase`)
|
|
to `no`. This will instruct the server not to forward messages to Firebase.
|
|
|
|
=== "Command line (curl)"
|
|
```
|
|
curl -H "X-Firebase: no" -d "This message won't be forwarded to FCM" ntfy.sh/mytopic
|
|
curl -H "Firebase: no" -d "This message won't be forwarded to FCM" ntfy.sh/mytopic
|
|
```
|
|
|
|
=== "HTTP"
|
|
``` http
|
|
POST /mytopic HTTP/1.1
|
|
Host: ntfy.sh
|
|
Firebase: no
|
|
|
|
This message won't be forwarded to FCM
|
|
```
|
|
|
|
=== "JavaScript"
|
|
``` javascript
|
|
fetch('https://ntfy.sh/mytopic', {
|
|
method: 'POST',
|
|
body: 'This message won't be forwarded to FCM',
|
|
headers: { 'Firebase': 'no' }
|
|
})
|
|
```
|
|
|
|
=== "Go"
|
|
``` go
|
|
req, _ := http.NewRequest("POST", "https://ntfy.sh/mytopic", strings.NewReader("This message won't be forwarded to FCM"))
|
|
req.Header.Set("Firebase", "no")
|
|
http.DefaultClient.Do(req)
|
|
```
|
|
|
|
=== "Python"
|
|
``` python
|
|
requests.post("https://ntfy.sh/mytopic",
|
|
data="This message won't be forwarded to FCM",
|
|
headers={ "Firebase": "no" })
|
|
```
|
|
|
|
=== "PHP"
|
|
``` php-inline
|
|
file_get_contents('https://ntfy.sh/mytopic', false, stream_context_create([
|
|
'http' => [
|
|
'method' => 'POST',
|
|
'header' =>
|
|
"Content-Type: text/plain\r\n" .
|
|
"Firebase: no",
|
|
'content' => 'This message won't be stored server-side'
|
|
]
|
|
]));
|
|
```
|
|
|
|
## List of all parameters
|
|
The following is a list of all parameters that can be passed when publishing a message. Parameter names are **case-insensitive**,
|
|
and can be passed as **HTTP headers** or **query parameters in the URL**.
|
|
|
|
| Parameter | Aliases (case-insensitive) | Description |
|
|
|---|---|---|
|
|
| `X-Message` | `Message`, `m` | Main body of the message as shown in the notification |
|
|
| `X-Title` | `Title`, `t` | [Message title](#message-title) |
|
|
| `X-Priority` | `Priority`, `prio`, `p` | [Message priority](#message-priority) |
|
|
| `X-Tags` | `Tags`, `ta` | [Tags and emojis](#tags-emojis) |
|
|
| `X-Delay` | `Delay`, `X-At`, `At`, `X-In`, `In` | Timestamp or duration for [delayed delivery](#scheduled-delivery) |
|
|
| `X-Cache` | `Cache` | Allows disabling [message caching](#message-caching) |
|
|
| `X-Firebase` | `Firebase` | Allows disabling [sending to Firebase](#disable-firebase) |
|